"Most school districts don't want to become NSAs," said a superintendent representative

Just as parents are grappling with how to keep their kids safe on social media, schools are increasingly confronting a controversial question: Should they do more to monitor students' online interactions off-campus to protect them from dangers such as bullying, drug use, violence and suicide?

In Huntsville, Alabama, the school system hired a retired FBI agent for security work, which includes reviewing social media "when a high priority tip is received about an emerging threat to a school, student or staff member," Keith Ward, a spokesman for the Huntsville City Schools, told CNN.

Ward said the district paid $157,190 to a firm, T&W, Inc., which employs the former FBI agent. The district's connection to the firm and the ex-agent was first reported by AI.com.

Last year, the district received a tip about a social media post concerning a threat to a high school teacher, Ward said. The student was found to have brought a knife with an eight inch blade to campus, he added.

"After this incident, the superintendent wanted to have a method to quickly identify threats before any harm might occur," Ward said.

The district started a program called Students Against Fear (SAFe), which is based on tips from students, staff members and parents. Only after a tip comes in regarding the potential for a student to pose a threat is the student's public social media activity checked out.

Since the program started, 14 students have been expelled, but not due to their social media posts, Ward said -- a review of their social media accounts merely supported the case for expulsion.

"As any good parent would do, we take all the measures that are appropriate to ensure the safety of our kids," said school district superintendent Casey Wardynski in September, when asked about the program at a news conference.

"We were able to save a life"

The Huntsville, Alabama school system is just the latest district to capture headlines for monitoring students on social media sites.

The school district went with the firm Geo Listening after a pilot program with the company helped a student who was talking on social media about "ending his life," company CEOChris Frydrych told CNN's Michael Martinez last September.

"We were able to save a life," said Richard Sheehan, the Glendale superintendent, adding that two students in the school district had committed suicide the past two years.

"It's just another avenue to open up a dialogue with parents about safety," he said.

The Glendale school district is not alone. David Jones, president of the firm Safe Outlook Corporation, said two school districts and three schools pay, on average, between $4,000 to $9,000 per year for one of his technology products called CompuGuardian and that he expects the number of schools participating to go up. (Jones said he was not at liberty to reveal which schools work with his company.)

His product gives schools access to, among other things, reporting tools that allow users to search key words connected to cyberbullying and drug use, and to see whether students are researching topics about dangers such as school violence.

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"You can identify a student, and you can jump into their activity logs and see exactly what they've typed, exactly where they've gone, exactly what they've done, and it gives you some history that you can go back to that child and use some disciplinary action," Jones said. "You can bring in the parent and say, 'Hey, look, this is what your child's doing. You need to talk to them about it.' "

Florida suicide sparks questions for schools

The issue of just what kids may be doing to each other online gained even more attention after a 12-year-old Florida girl, Rebecca Sedwick, who was allegedly repeatedly cyberbullied, jumped to her death in September of last year.

Wayne Blanton, executive director of the Florida School Boards Association, said the school was aware of on-campus bullying of Sedwick and dealt with it by separating the students and putting them in different classes, but it was not aware of any off-campus bullying -- online -- that was allegedly taking place.

Under a Florida law that went into effect in July of last year (PDF), before Sedwick's death, if parents or students notify a school about suspected bullying off-campus, the school has the authority to look at a student's Facebook posts and e-mails, according to Blanton.

"The key to everything is, we have to be notified ... because there is no way we could monitor all the Facebook accounts and e-mail accounts and tweets and Twitters and all that," Blanton said. "We have 2.8 million students, but if it's reported, our teachers, our principals, our school resource officers are receiving extensive training and acting immediately on that."

"A gray area that could ... lead to a lot of litigation"

Blanton said school administrators are talking, especially after the Sedwick case, about what more they can do in terms of monitoring kids' social media but said that besides the logistics of keeping tabs on millions of students, there are big legal questions about a student's privacy rights.

"I think that's the biggest issue you're wrestling with when you start intercepting someone's messages," Blanton said. "Should I intercept your messages based on certain words? You're really getting into a gray area that could potentially lead to a lot of litigation."

Photos:Where are your kids talking?

Photos:Where are your kids talking?

Ever wonder which apps your kids are glued to on their smartphones? Here's a sampling. Vine Kids: The six-second video platform released a separate version for kid-friendly posts.

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Photos:Where are your kids talking?

Vine: Quick six-second video loops are the hallmark of this service, which is rated 17+ in the iTunes Store.

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Photos:Where are your kids talking?

Snapchat: With this app, kids send photos and videos -- some of them racy -- that disappear within seconds.

Kik: A quick instant messaging service that in 2013 claimed 80 million users, who can send messages and photos with relative anonymity. It's rated 17+ but is growing in popularity with young teens and tweens.

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Photos:Where are your kids talking?

Ask.fm: It's meant to be a place where kids can ask tough questions and share their secrets, often anonymously. Started in 2010, it claimed 65 million users as of 2013 and has been linked to a number of cyberbullying cases that resulted in suicide.

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Facebook: The old social media standby. But according to a recent survey, teens' enthusiasm for the most popular social networking site is waning.

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Twitter: This service allows you to shoot messages of 140 characters or less out into the world -- or directly to friends and enemies. It's growing in popularity with teens.

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Instagram: Selfie central, it's where tweens and teens share photographic records of their lives, among other filtered photos.

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Tumblr: Users collect and share items of interest with fellow users, from videos to images to blog posts.

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4Chan: A legendary spot for dissing where anyone can post images on boards ... and anyone can comment. The channels here are not for the faint of heart.

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Reddit: "Subredditors" have power on this message board, where folks discuss everything from sex to Christmas presents and vote those links and comments up or down.

Daniel Domenech, executive director of the American Association of School Administrators, the school superintendents association, said it's "not always clear" legally what can be done and what is within the scope of the district's authority.

"In one state, the court will support the district and say, 'absolutely, you have the right to do that.' In a very similar situation in another court, the court will rule 'absolutely not, it's freedom of speech,' " Domenech said. "So the whole legal issue right now is very much up in the air."

And, in March 2014, a Minnesota student was awarded a $70,000 settlement after her school district forced her to turn over passwords for her Facebook and email accounts, according to the American Civil Liberties Union of Minnesota. As part of the settlement, the school district has agreed to change its policies to better protect students' rights.

"I think the best guideline we can give school districts is to always go back to the issue of the safety of the students uppermost," Domenech said. "If the safety of a student's involved and you are not necessarily sure whether the district has the authority to do it or not, well, you know what, go out on a limb at that point, because if you are talking about saving a student's life then you'd rather be safe than sorry."

John Palfrey Jr., head of the boarding school Phillips Academy in Massachusetts, said he and his colleagues try to strike a balance between ensuring students' safety and not having them feel "like we are recording their every move."

If a student follows him on Twitter, he will follow them back, but on Facebook, teachers don't accept friend requests from students or extend them, and they don't "go hunting around" to see what students are saying on the social networking platform.

CNN's Kelly Wallace says many parents are unaware of some of the sites kids are now using to bully online.

"We see certain spaces that they're communicating with their friends as akin to what they might be saying ... behind closed doors in a dorm room and I think that's a place where we, as administrators, don't belong," said Palfrey.

Public largely critical of school monitoring

How much to monitor students' social media is not just an issue fraught with logistical and legal challenges. There is also the court of public opinion, which leans heavily to the "schools are overreaching" side of the equation, according to comments we received on CNN's Facebook page.

"Schools need to respect boundaries and the First Amendment," Tom Gayda, who is director of student publications for an Indianapolis high school, wrote in an e-mail.

"Kids needs to be free to say (something) without feeling like the school is watching them 24/7," Gayda later said in an interview. "My concern is if a kid goes home and writes 'the school lunch sucks,' and the next day they're brought in and in trouble for complaining about school food."

But Lauren, a 20-year-old college student who only wanted to use her first name, believes that schools should be monitoring social media content posted by students because many times, she said, parents aren't aware of what their children are up to.

"I recently found my 13-year-old sister's Tumblr with the title 'Depressed but well dressed,' " Lauren said. "It immediately made me take action, let my parents know and make sure she got the help she needed.

"Had the situation been any different, the outcome might have been tragic," she said. "I support this measure and believe more schools should follow."

Social media monitoring: Wave of the future?

Domenech, who represents public school superintendents, said that at this stage, he thinks only a "very small number" of districts are actively monitoring students online, primarily because they don't have the staffing or the money to hire a firm to help.

Instead of more schools trying to follow the Huntsville, Alabama or Glendale, California district's lead, Blanton of the Florida School Boards Association believes schools should mount a major public relations campaign targeting students and parents, letting them know it's OK to report anything of concern they see online.

He compares it to an ad campaign in Florida from about 15 years ago encouraging students to report any weapons they see on campus. Now, 90% of guns found on school premisesin the stateare reported by students, he said.

"We have to get to the same point with when you see a student (or) another student sees a student being bullied, or a parent knows about a Facebook account, they have to let us know," Blanton said.

In the end, prevention is better than high-tech surveillance, said Domenech.

"I think most school districts don't want to become NSAs," he said. "We don't see that that is really our role."